77248152681 has 32 divisors (see below), whose sum is σ = 120511902720. Its totient is φ = 43092713664.

The previous prime is 77248152637. The next prime is 77248152691. The reversal of 77248152681 is 18625184277.

It is a happy number.

It is not a de Polignac number, because 77248152681 - 2¹¹ = 77248150633 is a prime.

It is a super-2 number, since 2×77248152681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77248152691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1787355 + ... + 1830063.

It is an arithmetic number, because the mean of its divisors is an integer number (3765996960).

Almost surely, 2^77248152681 is an apocalyptic number.

It is an amenable number.

77248152681 is a deficient number, since it is larger than the sum of its proper divisors (43263750039).

77248152681 is a wasteful number, since it uses less digits than its factorization.

77248152681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44765.

The product of its digits is 1505280, while the sum is 51.

The spelling of 77248152681 in words is "seventy-seven billion, two hundred forty-eight million, one hundred fifty-two thousand, six hundred eighty-one".